The all-new Audi S4 was presented about half a year ago, yet only entered production this month. I tried not to get too excited about its arrival, and I may have been right. The first real world impressions are good, but not spectacular.

For now, let’s just focus on the exhaust sound. A new S4 doesn’t come around every week. Two generations ago, it had a 4.2-liter FSI engine, which was then replaced by a supercharged V6. Now, it…